Class 11

21. d & f block elements question bank (Chemistry)

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Q1.

The bivalent metal ion having maximum paramagnetic behaviour among the first transition series elements is

(A)
\( Mn^{2+} \)
(B)
\( Cu^{2+} \)
(C)
\( Sc^{2+} \)
(D)
\( Cu^{+} \)
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Q2.

\( Mn^{2+} \) compounds are more stable than \( Fe^{2+} \) compounds towards oxidation to their \( +3 \) state, because

(A)
\( Mn^{2+} \) is more stable with high \( 3^{rd} \) ionisation energy
(B)
\( Mn^{2+} \) is bigger in size
(C)
\( Mn^{2+} \) has completely filled \( d \)-orbitals
(D)
\( Mn^{2+} \) does not exist
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